linux-kernel - Re: [PATCH 1/9] alpha: Convert mapping routine to rely on physical address

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Message-ID: <20250928115838.GF12165@unreal>
Date: Sun, 28 Sep 2025 14:58:38 +0300
From: Leon Romanovsky <leon@...nel.org>
To: Magnus Lindholm <linmag7@...il.com>
Cc: Jason Gunthorpe <jgg@...dia.com>,
	Marek Szyprowski <m.szyprowski@...sung.com>,
	Andreas Larsson <andreas@...sler.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"David S. Miller" <davem@...emloft.net>,
	Geoff Levand <geoff@...radead.org>, Helge Deller <deller@....de>,
	Ingo Molnar <mingo@...hat.com>, iommu@...ts.linux.dev,
	"James E.J. Bottomley" <James.Bottomley@...senpartnership.com>,
	Jason Wang <jasowang@...hat.com>, Juergen Gross <jgross@...e.com>,
	linux-alpha@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-mips@...r.kernel.org, linux-parisc@...r.kernel.org,
	linuxppc-dev@...ts.ozlabs.org,
	Madhavan Srinivasan <maddy@...ux.ibm.com>,
	Matt Turner <mattst88@...il.com>,
	Michael Ellerman <mpe@...erman.id.au>,
	"Michael S. Tsirkin" <mst@...hat.com>,
	Richard Henderson <richard.henderson@...aro.org>,
	sparclinux@...r.kernel.org,
	Stefano Stabellini <sstabellini@...nel.org>,
	Thomas Bogendoerfer <tsbogend@...ha.franken.de>,
	Thomas Gleixner <tglx@...utronix.de>,
	virtualization@...ts.linux.dev, x86@...nel.org,
	xen-devel@...ts.xenproject.org
Subject: Re: [PATCH 1/9] alpha: Convert mapping routine to rely on physical
 address

On Sun, Sep 28, 2025 at 01:27:12PM +0200, Magnus Lindholm wrote:
> > Thanks for the effort.
> >
> > Can you please check the following change instead of reverting the patches?
> >
> 
> No problem, happy to assist. I think this did the trick! preliminary
> testing shows
> that this now works on alpha! I guess the offset information in paddr was lost
> by doing "paddr &= PAGE_MASK" before retrieving the offset, well spotted!
> 
> I'll keep running the system with some load to make sure there is nothing else
> we haven't spotted yet, but so far so good. I'll keep you posted.
> 
> Will you be putting out a v2 of this patchset with these updates?

Yes, will try to send today. 

Thanks again for your help.

> 
> Regards
> 
> Magnus Lindholm